| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 31°F | 53°F | 41°F | 9.4" |
| February | 33°F | 56°F | 43°F | 5.5" |
| March | 40°F | 64°F | 51°F | 3.8" |
| April | 48°F | 74°F | 61°F | 8.9" |
| May | 56°F | 79°F | 67°F | 8.5" |
| June | 65°F | 87°F | 76°F | 7.1" |
| July | 68°F | 89°F | 77°F | 8.9" |
| August | 68°F | 87°F | 77°F | 5.2" |
| September | 62°F | 82°F | 71°F | 7.1" |
| October | 49°F | 73°F | 60°F | 9.3" |
| November | 39°F | 63°F | 50°F | 10.8" |
| December | 36°F | 56°F | 45°F | 9.2" |
| Index | Columbus | North Carolina | National |
| Air quality index | 44 | 35 | 42 |
| Pollution index | 3,495,600 | 2,789,538 | 2,726,193 |
| Measurement | Total |
| Days measured | 357 |
| Days with good air quality | 249 |
| Days with moderate air quality | 106 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.080% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.060% |
| Mercury | 0.040% |
| City | Population | Air Quality Index | National Avg. |
| Rutherfordton, NC | 4,071 | 36 | 28.0% |
| Ruth, NC | 629 | 36 | 28.0% |
| Chimney Rock Village, NC | 174 | 44 | 12.0% |
| Flat Rock CDP, NC | 1,435 | 44 | 12.0% |
| Lake Lure, NC | 1,634 | 44 | 12.0% |
| Columbus, NC | 1,240 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Wallace, LA | 1,240 | 41 | 18.0% |
| Rock Island, WA | 1,240 | 24 | 52.0% |
| Lamèque, NB | 1,240 | n/a | |
| St-Pierre-Jolys, MB | 1,240 | n/a | |
| Manning, AB | 1,240 | n/a | |
| Columbus, NC | 1,240 | 44 | 12.0% |
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